Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Rotor bearing and shaft set up.

Rotor bearing and shaft set up.

Rotor bearing and shaft set up.

Hello. Thank you for reading this and or answering my requests. I am designing a triple rotor MAV. Each rotor is 5 ft in dia. and 5.25 in. wide. The structure is made up of 3ea. 6061 2in dia. .065 wall aircraft aluminum tubing. At the end of each tubing is a rotor. What Im asking help for is how do I attach the rotors to the tubing, how do I arrange the rotor shaft with the bearings. Im wanting to use 5206 bearings with each rotor. Solid 4130 steel for the rotor shafts. How do I arrange the shaft, bearings and mounting to the 2 inch tubing. any help and or suggestions welcome.

RE: Rotor bearing and shaft set up.

<useless tangents>
Are you going to implement pitch control on each rotor, or rely on differential speed control for direction and attitude control?

Why use three rotors and not four? I ask because the software to control four fixed pitch rotors has to be readily available somewhere, whereas three rotors have to make pitch and roll control with translation somewhat challenging...


You might want to work backwards from your loads before selecting components.

Mike Halloran
Pembroke Pines, FL, USA

RE: Rotor bearing and shaft set up.

Hello Mike. Thank you for replying. Im using 3 rotors because that is all I have now. I understand what you are saying about using 4. It would be better to use 4 instead, better stability but would have to use more power. Im not using any software because of money but just using the old hand controls and rods etc. Im not sure of how the bearings and rotor shafts should go. I want to use a thrust bearing and the axial bearing (5206) together, but not sure of how to put it all together. I have many other questions also but will wait on answers for this first. Sorry, PS, yes I want to have pitch control on all of the rotors. I will use all 4 for collective and for cyclic. Each rotor will be surrounded by a shroud. Rotors will be above pilot with I think a 90 to 100 horse power engine.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close